So we've got:

*The original, Australia
*New Zealand
*United States
*Texas (pretty much a country to itself ~~ ask most any Texan)

Then there are the known versions we don't yet have the lyrics for:
Canada (this one is a partial, as it starts out like the U.S. version)
Would the version McGrath of Harlow mentions be from England?

And of course, the beer version. I would think that would have to go in the parody column.

I'm still waiting for the Czech version.